Fixes from review

typo fix; more explanation of AppendUnique in DummyEnvironment
test class.

Signed-off-by: Mats Wichmann <[email protected]>

Author: mwichmann

SCons/Tool/ToolTests.py

@@ -39,7 +39,9 @@ def Detect(self, progs):
         return progs[0]
     def Append(self, **kw) -> None:
         self.dict.update(kw)
-    AppendUnique = Append  # wrong, but good enough for the use
+    # Adding a tool now calls AppendUnique so we need a mocked one. Since
+    # the only usage is adding one tool, using Append is good enough.
+    AppendUnique = Append
     def __getitem__(self, key):
         return self.dict[key]
     def __setitem__(self, key, val) -> None:

doc/man/scons.xml

@@ -7725,8 +7725,8 @@ A tool specification module has two required entry points:
 <para>Modify the &consenv; <parameter>env</parameter>
 to set up necessary &consvars;, Builders, Emitters, etc.,
 so the facilities represented by the tool can be executed.
-Take Care not to overwrite &consvars; which may
-have been explicitly set by the user,
+Take care not to overwrite &consvars; which may
+have been explicitly set by the user;
 retain and/or append instead. For example:
 </para>
 <programlisting language="python">