Removed white new lines

Author: VaclavMacha

docs/src/lecture_02/conditions.md

@@ -40,13 +40,15 @@ x is equal to y
 <header class="admonition-header">Function declaration:</header>
 <div class="admonition-body">
 ```
+
 So far, we did not show how to define functions. However, the above example should show the basic syntax for defining functions. The `return` keyword specifies the function output. In this case, the function returns nothing since we only want to compare numbers. If we need to define a function that returns more than one variable, the following syntax is used.
 
 ```julia
 return x, y, z
 ```
 
 Here `x`, `y`, and `z` are some variables. We will discuss the function declaration in more detail in the [next lesson](@ref Functions).
+
 ```@raw html
 </div></div>
 ```
@@ -158,6 +160,7 @@ julia> compare(2.3, 2.3)
 <header class="admonition-header">Exercise:</header>
 <div class="admonition-body">
 ```
+
 Write the `fact(n)` function that computes the factorial of `n`. Use the following function declaration:
 
 ```julia
@@ -169,6 +172,7 @@ end
 Make sure that the input argument is a non-negative integer. For negative input arguments and for arguments that can not be represented as an integer, the function should throw an error.
 
 **Hint:** use recursion, the `isinteger` function and the `error` function. The or operator is written by `|`.
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 ```@raw html
 </div></div>
 <details class = "solution-body">
@@ -278,6 +282,7 @@ julia> f(1) || println(2) # both expressions are evaluated
 <header class="admonition-header">Short-circuit evaluation vs. bitwise boolean operators</header>
 <div class="admonition-body">
 ```
+
 Boolean operations without short-circuit evaluation can be done with the bitwise boolean operators `&` and `|` introduced in [previous lecture](@ref Numeric-comparison). These are normal functions, which happen to support infix operator syntax, but always evaluate their arguments.
 
 ```jldoctest shortcirc
@@ -290,6 +295,7 @@ julia> f(1) && t(2)
 1
 false
 ```
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 ```@raw html
 </div></div>
 ```
@@ -340,7 +346,9 @@ true
 <header class="admonition-header">Exercise:</header>
 <div class="admonition-body">
 ```
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 Rewrite the factorial function from the exercises above. Use the short-circuit evaluation to check if the given number is a non-negative integer and the ternary operator for recursion.
+
 ```@raw html
 </div></div>
 <details class = "solution-body">

docs/src/lecture_02/exercises.md

@@ -27,6 +27,7 @@ There will be a whole [section](@ref Plots.jl) dedicated to the Plots package. H
 <header class="admonition-header">Exercise 1: </header>
 <div class="admonition-body">
 ```
+
 Every programmer should be able to rewrite pseudocode to actual code. The goal of this exercise is to rewrite the following pseudocode:
 
 ![](juliasetalg.png)
@@ -56,6 +57,7 @@ heatmap(A;
     ticks = :none
 )
 ```
+
 ```@raw html
 </div></div>
 <details class = "solution-body">
@@ -125,6 +127,7 @@ heatmap(A;
 <header class="admonition-header">Exercise 2:</header>
 <div class="admonition-body">
 ```
+
 In the previous exercise, we rewrote pseudocode to an actual Julia code. This exercise will improve the central part of the code: the inner loop. Write a function which replaces the inner loop in the code from the exercise above. Use the following function definition
 
 ```julia
@@ -202,10 +205,12 @@ heatmap(A1;
 <header class="admonition-header">Exercise 3: </header>
 <div class="admonition-body">
 ```
+
 Try different values of variable `c` to create different plots. For inspiration, check the Wikipedia page about [Julia set](https://en.wikipedia.org/wiki/Julia_set).
 ```@raw html
 </div></div>
 ```
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 - ``c = 0.285 + 0.01 \cdot i``
 ![](juliaset_ex3_1.svg)
 

docs/src/lecture_02/loops.md

@@ -51,6 +51,7 @@ i = 5
 <header class="admonition-header">An alternative notation for <code>for</code> loops</header>
 <div class="admonition-body">
 ```
+
 There are two alternative notations for the `for` loop. It is possible to use the `=` or `∈` symbol instead of the `in` keyword.
 
 ```jldoctest
@@ -65,6 +66,7 @@ i = 5
 ```
 
 However, it is better to use the `in` keyword to improve code readability. Regardless of which notation is used, it is essential to be consistent and use the same notation in all `for` loops.
+
 ```@raw html
 </div></div>
 ```
@@ -102,9 +104,11 @@ Hi, my name is Bob and I am 23 old.
 <header class="admonition-header">Exercise:</header>
 <div class="admonition-body">
 ```
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 Use `for` or `while` loop to print all integers between `1` and `100` which can be divided by both `3` and `7`.
 
 **Hint:** use the `mod` function.
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 ```@raw html
 </div></div>
 <details class = "solution-body">
@@ -201,7 +205,9 @@ The code after the `continue` keyword is not evaluated.
 <header class="admonition-header">Exercise:</header>
 <div class="admonition-body">
 ```
+
 Rewrite the code from the exercise above. Use a combination of the `while` loop and the keyword `continue` to print all integers between `1` and `100` divisible by both `3` and `7`. In the declaration of the `while` loop use the `true` value instead of a condition. Use the `break` keyword and a proper condition to terminate the loop.
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 ```@raw html
 </div></div>
 <details class = "solution-body">
@@ -295,6 +301,7 @@ There are other limitations of the shorter syntax, such as the impossibility to
 <header class="admonition-header">Exercise:</header>
 <div class="admonition-body">
 ```
+
 Use nested loops to create a matrix with elements given by the formula
 
 ```math
@@ -304,6 +311,7 @@ A_{i, j} = \frac{1}{2}\exp\left\{\frac{1}{2} (x_{i}^2 - y_{j}^2) \right\} \quad
 where ``x \in \{0.4, 2.3, 4.6\}`` and ``y \in \{1.4, -3.1, 2.4, 5.2\}``.
 
 **Bonus:** try to create the same matrix in a more effective way.
+
 ```@raw html
 </div></div>
 <details class = "solution-body">
@@ -410,7 +418,9 @@ julia> [(x, y, x + y)  for x in 1:10, y in 1:10 if x + y < 5]
 <header class="admonition-header">Exercise:</header>
 <div class="admonition-body">
 ```
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 Use the list comprehension to create a vector of all integers from `1` to `100` divisible by `3` and `7` simultaneously. What is the sum of all these integers?
+
 ```@raw html
 </div></div>
 <details class = "solution-body">
@@ -502,7 +512,9 @@ julia> collect(gen)
 <header class="admonition-header">Exercise:</header>
 <div class="admonition-body">
 ```
+
 Use a generator to sum the square of all integers from `1` to `100`, which are divisible by `3` and `7` simultaneously.
+
 ```@raw html
 </div></div>
 <details class = "solution-body">
@@ -600,6 +612,7 @@ julia> for (i, vals) in enumerate(zip([1, 4, 2, 5], 2:12, (:a, :b, :c)))
 <header class="admonition-header">Exercise:</header>
 <div class="admonition-body">
 ```
+
 Create a matrix with elements given by the following formula
 
 ```math
@@ -612,6 +625,7 @@ where `i` represents row's number and `i_sum` the sum of all elements in this ro
 > *Sum of all elements in a column `i` is `i_sum`*
 
 **Hint:** use iterators `eachcol` and `eachrow`.
+
 ```@raw html
 </div></div>
 <details class = "solution-body">