Spelling corrections for src directory

Spelling corrections as found by codespell and in #561.

Some reported problems were already fixed, others are fixed here, with some exceptions (a,o.):
- "referenceby" in defgen.cpp as this is in the output and I cannot oversee the consequences (looks like none, but ...)
- "HANGEUL_CHARSET" left as is as in some MS documentation is written: 'HANGUL_CHARSET: Also spelled "Hangeul". Specifies the Hangul Korean character set.' (https://docs.microsoft.com/en-us/openspecs/windows_protocols/ms-wmf/0d0b32ac-a836-4bd2-a112-b6000a1b4fc9).

1 files changed, 1 insertions, 1 deletions

diff --git a/src/filedef.cpp b/src/filedef.cpp
index f358dba..f00c82b 100644
--- a/src/filedef.cpp
+++ b/src/filedef.cpp
@@ -735,7 +735,7 @@ void FileDefImpl::writeClassDeclarations(OutputList &ol,const QCString &title,Cl
 
 void FileDefImpl::writeInlineClasses(OutputList &ol)
 {
-  // temporarily undo the disbling could be done by startMemberDocumentation()
+  // temporarily undo the disabling could be done by startMemberDocumentation()
   // as a result of setting SEPARATE_MEMBER_PAGES to YES; see bug730512
   bool isEnabled = ol.isEnabled(OutputGenerator::Html);
   ol.enable(OutputGenerator::Html);