Fix spelling errors in some perl modules.

lib/LaTeXML/Common/Locator.pm

@@ -146,7 +146,7 @@ case of an anonymous string. C<$fromLine> and C<$fromCol> should be integers
 containing the line and column numbers of the start of the range in the source
 file, or undef if unknown. C<$toLine> and C<$toCol> should be the integers
 containing the line and column numbers of the end of the range, or undef 
-if a point is being refered to. 
+if a point is being referred to. 
 
 =item C<< $locator = LaTeXML::Common::Locator->newRange($from, $to); >>
 
@@ -179,7 +179,7 @@ Checks if this locator points to a range or a point.
 
 =item C<< $source = $locator->getShortSource($stringSource); >>
 
-Gets a short string refering to the source of this locator. 
+Gets a short string referring to the source of this locator. 
 C<$stringSource> will be used if the source refers to an
 anonymous or literal string input. 
 

lib/LaTeXML/Core/KeyVal.pm

@@ -274,19 +274,19 @@ meta-data is stored.
 
 =item C<< $keyval->defineOrdinary($code); >>
 
-Helper function to define $STATE neccesary for an ordinary key. 
+Helper function to define $STATE necessary for an ordinary key. 
 
 =item C<< $keyval->defineCommand($code, $macroprefix); >>
 
-Helper function to define $STATE neccesary for a command key. 
+Helper function to define $STATE necessary for a command key. 
 
 =item C<< $keyval->defineChoice($code, $mismatch, $choices, $normalize, $bin); >>
 
-Helper function to define $STATE neccesary for an choice key. 
+Helper function to define $STATE necessary for an choice key. 
 
 =item C<< $keyval->defineBoolean($code, $mismatch, $macroprefix); >>
 
-Helper function to define $STATE neccesary for a boolean key. 
+Helper function to define $STATE necessary for a boolean key. 
 
 =back
 

lib/LaTeXML/Core/KeyVals.pm

@@ -524,15 +524,15 @@ I<prefix> is the given prefix all key-value pairs operate in and defaults to
 C<'KV'>. If given, prefix should be a string. 
 
 I<keysets> should be a list of keysets to find keys inside of. If given, it
-should either be reference to a list of strings or a comma-seperated string. 
+should either be reference to a list of strings or a comma-separated string. 
 This argument defaults to C<'_anonymous_'>. 
 
 Furthermore, the KeyVals constructor accepts a variety of options that can
 be used to customize its behaviour. These are I<setAll>, I<setInternals>, 
 I<skip>, I<skipMissing>, I<hookMissing>, I<open>, I<close>.
 
 I<setAll> is a flag that, if set, ensures that keys will be set in all existing
-keysets, instad of only in the first one. 
+keysets, instead of only in the first one. 
 
 I<setInternals> is a flag that, if set, ensures that certain 'xkeyval' package
 internals are set during key digestion. 
@@ -547,7 +547,7 @@ such a key, if set to C<1> they are ignored. Alternatively, this can be set to a
 key macro which is then extended to contain a comman-separated list of the
 undefined keys. 
 
-I<hookMissing> allows to call a specific macro if a single key is unknown during
+I<hookMissing> allows one to call a specific macro if a single key is unknown during
 key digestion. 
 
 =back
@@ -695,7 +695,7 @@ sequence of Tokens that was used to be read it from the gullet.
 
 =item C<< $str = $keyvals->toString(); >>
 
-Turns this object into a key=value comma seperated string. 
+Turns this object into a key=value comma separated string. 
 
 =back