templater: provide hint for multi-line templates with parse errors
Previously, we punted. Now we "rewrite" the template's newlines to r'\n' and
offset the hint appropriately.
Differential Revision: https://phab.mercurial-scm.org/D2609
# See http://EditorConfig.org for the specification
root = true
[*.py]
indent_size = 4
indent_style = space
trim_trailing_whitespace = true
[*.{c,h}]
indent_size = 8
indent_style = tab
trim_trailing_whitespace = true