[lib] Add hyphen to 'well-defined' (#1776)

Author: jensmaurer

source/iterators.tex

@@ -1043,7 +1043,7 @@
 \begin{example}
 If
 \tcode{evolve()}
-is well defined for bidirectional iterators, but can be implemented more
+is well-defined for bidirectional iterators, but can be implemented more
 efficiently for random access iterators, then the implementation is as follows:
 
 \begin{codeblock}

source/locales.tex

@@ -2147,7 +2147,7 @@
 \pnum
 \requires
 \tcode{(to <= to_end)}
-well defined and \tcode{true}; state initialized, if at the beginning of a sequence,
+well-defined and \tcode{true}; state initialized, if at the beginning of a sequence,
 or else equal to the result of converting the preceding characters in the
 sequence.
 

source/threads.tex

@@ -725,7 +725,7 @@
 \pnum
 \returns The number of hardware thread contexts. \begin{note} This value should
 only be considered to be a hint. \end{note} If this value is not computable or
-well defined, an implementation should return 0.
+well-defined, an implementation should return 0.
 \end{itemdescr}
 
 \rSec3[thread.thread.algorithm]{\tcode{thread} specialized algorithms}