fix typos, learn word, avoid short form

Author: coke

doc/Language/control.pod6

@@ -88,17 +88,17 @@ have unnecessary semicolons for clarity.
 
 The C<when> block is not usually a stand-alone block since it most commonly used
 inside C<given>, C<for>, and C<loop> blocks and special details of its usage in
-those contexts are discussed there. However, there are a few subleties in proper
+those contexts are discussed there. However, there are a few subtleties in proper
 syntax of the contents inside the block's curly braces worth high-lighting.
 Treat the contents pretty much as any block except for function calls.  (Details are found
-L<here|/language/syntax#Signature_literals>A). For example, calling a help function (C<sub help>)
+L<here|/language/syntax#Signature_literals>). For example, calling a help function (C<sub help>)
 from a CLI program argument list:
 
 =begin code :skip-test
 for @*ARGS {
     # ... other when blocks
-    when /:i ^ h/ { &help   }  # v1: error, no parens with sub ref
-    when /:i ^ h/ { &help;  }  # v2: error, no parens with sub ref
+    when /:i ^ h/ { &help   }  # v1: error, no parentheses with sub ref
+    when /:i ^ h/ { &help;  }  # v2: error, no parentheses with sub ref
     when /:i ^ h/ { &help() }  # v3: calls sub help ok
     when /:i ^ h/ { help    }  # v4: calls sub help ok
     when /:i ^ h/ { help()  }  # v5: calls sub help ok

xt/words.pws

@@ -147,6 +147,7 @@ cis
 classhow
 classname
 classtut
+cli
 closedir
 cmd
 cmp