Use std namespace.

I had to rename distance() (in coord.h) to distance2() because it conflicts
with the STL function to compare 2 iterators. Not a bad change given how it
returns the square of the distance anyway.
I also had to rename the message global variable (in message.cc) to buffer.

I tried to fix and improve the coding style has much as I could, but I
probably missed a few given how huge and tedious it is.

I also didn't touch crawl-gdb.py, and the stuff in prebuilt, rltiles/tool
and util/levcomp.*, because I have no clue about those.

1 files changed, 3 insertions, 3 deletions

diff --git a/crawl-ref/source/melee_attack.h b/crawl-ref/source/melee_attack.h
index 879e686868..020cf7011f 100644
--- a/crawl-ref/source/melee_attack.h
+++ b/crawl-ref/source/melee_attack.h
@@ -130,8 +130,8 @@ private:
 private:
     // Monster-attack specific stuff
     void mons_apply_attack_flavour();
-    std::string mons_attack_verb();
-    std::string mons_attack_desc();
+    string mons_attack_verb();
+    string mons_attack_desc();
     // TODO: Unify do_poison and poison_monster
     void mons_do_poison();
     void mons_do_napalm();
@@ -165,7 +165,7 @@ private:
     random_var player_weapon_speed();
     random_var player_unarmed_speed();
     void player_announce_aux_hit();
-    std::string player_why_missed();
+    string player_why_missed();
     void player_warn_miss();
     void player_weapon_upsets_god();
     void _defender_die();