Documentation fix-up: "its" vs. "it's"pr/91

Removed ungrammatical apostrophes from documentation, replacing
"it's" with "its" where appropriate (but in a few cases with "it is"
when that read better).

While doing that, I also fixed a couple of minor typos etc.
as I noticed them.

1 files changed, 1 insertions, 1 deletions

diff --git a/lib/sqlalchemy/sql/schema.py b/lib/sqlalchemy/sql/schema.py
index e8f1ffae1..9ff022f60 100644
--- a/lib/sqlalchemy/sql/schema.py
+++ b/lib/sqlalchemy/sql/schema.py
@@ -1241,7 +1241,7 @@ class Column(SchemaItem, ColumnClause):
                 for f in self.foreign_keys]
         if name is None and self.name is None:
             raise exc.InvalidRequestError("Cannot initialize a sub-selectable"
-                    " with this Column object until it's 'name' has "
+                    " with this Column object until its 'name' has "
                     "been assigned.")
         try:
             c = self._constructor(