UI: Use 'and' Instead of '&' in Descriptions

Use 'and' instead of ampersand in descriptions and comments.

Differential Revision: https://developer.blender.org/D9797

Reviewed by Aaron Carlisle

source/blender/makesrna/intern/rna_access.c

@@ -1106,7 +1106,7 @@ bool RNA_struct_bl_idname_ok_or_report(ReportList *reports,
 #endif
   if (p == NULL || p == identifier || p + len_sep >= identifier + len_id) {
     BKE_reportf(
-        reports, report_level, "'%s' doesn't contain '%s' with prefix & suffix", identifier, sep);
+        reports, report_level, "'%s' does not contain '%s' with prefix and suffix", identifier, sep);
     return failure;
   }