Add changes suggested in review by @drdrew42.

Author: drgrice1

lib/PGalias.pm

@@ -96,7 +96,7 @@ sub initialize {
 	$self->{problemUUID}         = $envir->{problemUUID} // 0;
 
 	# Find auxiliary files even when the main file is in templates/tmpEdit
-	# FIXME:  This shouldn't be done her.  Instead the front end should pass in the problem source with the file name.
+	# FIXME:  This shouldn't be done here.  Instead the front end should pass in the problem source with the file name.
 	# The other instance of this in PGloadfiles.pm needs to be removed.
 	$self->{pgFileName} =~ s!(^|/)tmpEdit/!$1!;
 

lib/WeBWorK/PG/Environment.pm

@@ -100,7 +100,7 @@ sub new ($invocant, $courseName = '___') {
 
 	# Note that placeholders used in $pg_envir->{URLs}{html}, $pg_envir->{directories}{OPL}, and
 	# $pg_envir->{directories}{Contrib} are set on the first iteration, and those carry over to anywhere those
-	# placehoders are are used in other settings on the second iteration.
+	# placeholders are are used in other settings on the second iteration.
 	for (1 .. 2) {
 		$pg_envir = replacePlaceholders(
 			$pg_envir,

lib/WeBWorK/PG/IO.pm

@@ -101,8 +101,7 @@ contents of the file.
 
 sub read_whole_problem_file {
 	my $filePath = shift;
-	$filePath =~ s/^\s*//;    # get rid of initial spaces
-	$filePath =~ s/\s*$//;    # get rid of final spaces
+	$filePath =~ s/^\s*|\s$//g;    # get rid of leading and trailing spaces
 	$filePath = "$filePath.pg" unless $filePath =~ /\.pg$/;
 	read_whole_file($filePath);
 }

lib/WeBWorK/PG/ImageGenerator.pm

@@ -388,7 +388,7 @@ sub render ($self, %options) {
 		$dvipngout = readFile("$wd/dvipng.out") if (-r "$wd/dvipng.out");
 		my @dvipngdepths = ($dvipngout =~ /depth=(\d+)/g);
 
-		# Kill them all if something goes wrnog
+		# Kill them all if something goes wrong
 		@dvipngdepths = () if (scalar(@dvipngdepths) != scalar(@newNames));
 
 		# move/rename images

lib/WeBWorK/PG/Translator.pm

@@ -1119,7 +1119,7 @@ sub std_problem_grader {
 		} else {
 			warn "Error: Answer $ans_name is not a hash";
 			warn "$evaluated_answers{$ans_name}";
-			warn 'This probably means that the answer evaluator is for this answer is not working correctly.';
+			warn 'This probably means that the answer evaluator for this answer is not working correctly.';
 			$problem_result{error} = "Error: Answer $ans_name is not a hash: $evaluated_answers{$ans_name}";
 		}
 	}