tox: correct documentation helper paths

When building with `-M`, it is not required to set an explicit builder
output path; updating.

Signed-off-by: James Knight <[email protected]>

Author: jdknight

tox.ini

@@ -49,11 +49,11 @@ usedevelop = false
 
 [testenv:doc-html]
 changedir = doc
-commands = {envpython} -m sphinx -M html . _build/html -E -a
+commands = {envpython} -m sphinx -M html . _build -E -a
 
 [testenv:doc-latexpdf]
 changedir = doc
-commands = {envpython} -m sphinx -M latexpdf . _build/latexpdf -E -a
+commands = {envpython} -m sphinx -M latexpdf . _build -E -a
 
 [testenv:pylint]
 deps =