[PATCH 4/6] errors: indent "invalid value for %define" context

[Theophile Ranquet]

This is the continuation of the work on the readability of errors
    context.

For example, what used to be:
  input.y:1.9-29: invalid value for %define variable 'foo' : 'bar'
  input.y:1.9-29: accepted value: 'most'

is now:
  input.y:1.9-29: invalid value for %define variable 'foo' : 'bar'
  input.y:1.9-29:     accepted value: 'most'

* src/muscle-tab.c (muscle_percent_define_check_values): Use
complain_at_indent to output with increased indentation level.
* tests/input:at: Apply this change.
---
 src/muscle-tab.c |   11 +++++++----
 tests/input.at   |    7 ++++---
 2 files changed, 11 insertions(+), 7 deletions(-)

diff --git a/src/muscle-tab.c b/src/muscle-tab.c
index d187f82..37a0f0e 100644
--- a/src/muscle-tab.c
+++ b/src/muscle-tab.c
@@ -593,12 +593,15 @@ muscle_percent_define_check_values (char const * const 
*values)
             }
           if (!*values)
             {
+              unsigned i = 0;
               location loc = muscle_percent_define_get_loc (*variablep);
-              complain_at(loc,
-                          _("invalid value for %%define variable %s: %s"),
-                          quote (*variablep), quote_n (1, value));
+              complain_at_indent (loc, &i,
+                                _("invalid value for %%define variable %s: 
%s"),
+                                  quote (*variablep), quote_n (1, value));
+              i += SUB_INDENT;
               for (values = variablep + 1; *values; ++values)
-                complain_at (loc, _("accepted value: %s"), quote (*values));
+                complain_at_indent (loc, &i, _("accepted value: %s"),
+                                    quote (*values));
             }
           else
             {
diff --git a/tests/input.at b/tests/input.at
index 2facf9e..f208b5f 100644
--- a/tests/input.at
+++ b/tests/input.at
@@ -1033,12 +1033,13 @@ start: ;
 ]])
 AT_BISON_CHECK([[input.y]], [[1]], [[]],
 [[input.y:1.9-29: invalid value for %define variable 'lr.default-reductions': 
'bogus'
-input.y:1.9-29: accepted value: 'most'
-input.y:1.9-29: accepted value: 'consistent'
-input.y:1.9-29: accepted value: 'accepting'
+input.y:1.9-29:     accepted value: 'most'
+input.y:1.9-29:     accepted value: 'consistent'
+input.y:1.9-29:     accepted value: 'accepting'
 ]])
 
 # Back-end.
+# FIXME: these should be indented, but we shouldn't mess with the m4 yet
 AT_DATA([[input.y]],
 [[%define api.push-pull neither
 %%
-- 
1.7.10