patch 8.2.0156: various typos in source files and tests

Problem:    Various typos in source files and tests.
Solution:   Fix the typos. (Emir Sari, closes #5532)
diff --git a/src/INSTALLvms.txt b/src/INSTALLvms.txt
index 7966e6f..3e05b53 100644
--- a/src/INSTALLvms.txt
+++ b/src/INSTALLvms.txt
@@ -198,7 +198,7 @@
      more information can be found in os_vms_fix.com file itself.
 
      NOTE: even if os_vms_fix.com will fix all pre-processor directives it will
-     leave singe (long) line directives. You have to fix them manually.
+     leave single (long) line directives. You have to fix them manually.
      Known problematic files are option.h and option.c
 
 4.2. After the conversion you can continue building as it has been described
@@ -319,7 +319,7 @@
 
      Build it as normally.
 
-     Used sharable images are:
+     Used shareable images are:
 	gtk_root:[glib]libglib.exe /share,-
 	gtk_root:[glib.gmodule]libgmodule.exe /share,-
 	gtk_root:[gtk.gdk]libgdk.exe /share,-