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, 2 insertions, 2 deletions

diff --git a/src/markdown.cpp b/src/markdown.cpp
index d1a6a63..f6720ea 100644
--- a/src/markdown.cpp
+++ b/src/markdown.cpp
@@ -2021,7 +2021,7 @@ static int writeBlockQuote(GrowBuf &out,const char *data,int size)
         out.addStr("<blockquote>\n");
       }
     }
-    else if (level<curLevel) // quote level descreased => add end markers
+    else if (level<curLevel) // quote level decreased => add end markers
     {
       for (l=level;l<curLevel;l++)
       {
@@ -2470,7 +2470,7 @@ static QCString detab(const QCString &s,int &refIndent)
           while (stop--) out.addChar(' '); 
         }
         break;
-      case '\n': // reset colomn counter
+      case '\n': // reset column counter
         out.addChar(c);
         col=0;
         break;