Fix a few minor typos in comments and error messages

Regarding "initialize" vs. "initialise", www.dict.cc says the first is American
English whereas the latter in British English. For consistency, we should
stick to American English.

src/config_file.c

@@ -641,7 +641,7 @@ static int parse_section_header_ext(const char *line, const char *base_name, cha
 	ret = snprintf(*section_name, total_len, "%s %s", base_name, subsection);
 	if (ret >= total_len) {
 		/* If this fails, we've checked the length wrong */
-		error = git__throw(GIT_ERROR, "Failed to parse ext header. Wrong total lenght calculation");
+		error = git__throw(GIT_ERROR, "Failed to parse ext header. Wrong total length calculation");
 		goto out;
 	} else if (ret < 0) {
 		error = git__throw(GIT_EOSERR, "Failed to parse ext header. OS error: %s", strerror(errno));
@@ -804,7 +804,7 @@ static int config_parse(file_backend *cfg_file)
 	char *var_value;
 	cvar_t *var;
 
-	/* Initialise the reading position */
+	/* Initialize the reading position */
 	cfg_file->reader.read_ptr = cfg_file->reader.buffer.data;
 	cfg_file->reader.eof = 0;
 
@@ -1001,7 +1001,7 @@ static int parse_variable(file_backend *cfg, char **var_name, char **var_value)
 
 		*var_value = tmp;
 	} else {
-		/* If thre is no value, boolean true is assumed */
+		/* If there is no value, boolean true is assumed */
 		*var_value = NULL;
 	}
 

src/msvc-compat.h

@@ -17,7 +17,7 @@
 # define S_ISREG(m)   (((m) & _S_IFMT) == _S_IFREG)
 # define S_ISFIFO(m)  (((m) & _S_IFMT) == _S_IFIFO)
 
-/* case-insensitive string comparision */
+/* case-insensitive string comparison */
 # define strcasecmp   _stricmp
 # define strncasecmp  _strnicmp