[except.handle, except.spec, fs.op.temp_dir_path] Fix typos

Author: tkoeppe

source/exceptions.tex

@@ -732,7 +732,7 @@
 the declaration has a potentially throwing exception specification
 unless it is a destructor or a deallocation function
 or is defaulted on its first declaration,
-in which cases the exception specfication
+in which cases the exception specification
 is as specified below
 and no other declaration for that function
 shall have a \grammarterm{noexcept-specifier}.
@@ -883,7 +883,7 @@
 or a destructor without a \grammarterm{noexcept-specifier},
 is potentially-throwing if and only if
 any of the destructors
-for any of its potentially constructed subojects
+for any of its potentially constructed subobjects
 is potentially throwing.
 
 \pnum

source/iostreams.tex

@@ -15177,7 +15177,7 @@
 
 \begin{itemdescr}
 \pnum
-\returns An unspecifed directory path suitable for temporary files. An error shall be reported if
+\returns An unspecified directory path suitable for temporary files. An error shall be reported if
 \tcode{!exists(p) || !is_directory(p)}, where \tcode{p} is the path to be returned.
   The signature with argument \tcode{ec} returns \tcode{path()} if an
   error occurs.