Merge pull request mysql2sqlite#76 from coreymgilmore/improved-usage-instructions

doc: improve built-in instructions on how to use this script

Author: dumblob

mysql2sqlite

@@ -9,8 +9,13 @@ function printerr( s ){ print s | "cat >&2" }
 BEGIN {
   if( ARGC != 2 ){
     printerr( \
-      "USAGE: mysql2sqlite dump_mysql.sql > dump_sqlite3.sql\n" \
-      "       file name - (dash) is not supported, because - means stdin")
+      "USAGE:\n"\
+      "       mysql2sqlite dump_mysql.sql > dump_sqlite3.sql\n" \
+      "       OR\n" \
+      "       mysql2sqlite dump_mysql.sql | sqlite3 sqlite.db\n" \
+      "\n" \
+      "NOTES:\n" \
+      "       Dash in filename is not supported, because dash (-) means stdin." )
     no_END = 1
     exit 1
   }