patch 9.0.0828: various typos

Problem:    Various typos.
Solution:   Correct typos. (closes #11432)
diff --git a/src/GvimExt/Make_ming.mak b/src/GvimExt/Make_ming.mak
index 5cde184..0ebe08a 100644
--- a/src/GvimExt/Make_ming.mak
+++ b/src/GvimExt/Make_ming.mak
@@ -3,7 +3,7 @@
 # To be used with MingW and Cygwin.
 #
 # Originally, the DLL base address was fixed: -Wl,--image-base=0x1C000000
-# Now it is allocated dymanically by the linker by evaluating all DLLs
+# Now it is allocated dynamically by the linker by evaluating all DLLs
 # already loaded in memory. The binary image contains as well information
 # for automatic pseudo-rebasing, if needed by the system. ALV 2004-02-29