gdb: rename source_styling_changed observer

In a later commit I plan to add disassembler styling.  In the same way
that we have a source_styling_changed observer I would need to add a
disassembler_styling_changed observer.

However, currently, these observers would only be notified from
cli-style.c:set_style_enabled, and observed in tui-winsource.c,
tui_source_window::style_changed, as a result, having two observers
seems unnecessary right now, so, in this commit, I plan to rename
source_styling_changed to just styling_changed, then, in the later
commit, when disassembler styling is added, I can use the same
observer for both source styling, and disassembler styling.

There should be no user visible changes after this commit.

1 files changed, 2 insertions, 2 deletions

diff --git a/gdb/tui/tui-winsource.c b/gdb/tui/tui-winsource.c
index 955b689..e2ab87e 100644
--- a/gdb/tui/tui-winsource.c
+++ b/gdb/tui/tui-winsource.c
@@ -292,14 +292,14 @@ tui_source_window_base::tui_source_window_base ()
   m_start_line_or_addr.loa = LOA_ADDRESS;
   m_start_line_or_addr.u.addr = 0;
 
-  gdb::observers::source_styling_changed.attach
+  gdb::observers::styling_changed.attach
     (std::bind (&tui_source_window::style_changed, this),
      m_observable, "tui-winsource");
 }
 
 tui_source_window_base::~tui_source_window_base ()
 {
-  gdb::observers::source_styling_changed.detach (m_observable);
+  gdb::observers::styling_changed.detach (m_observable);
 }
 
 /* See tui-data.h.  */