docs: minor tweaks to db docs

Author: nedbat

coverage/numbits.py

@@ -142,8 +142,8 @@ def register_sqlite_functions(connection):
         conn = sqlite3.connect('example.db')
         register_sqlite_functions(conn)
         c = conn.cursor()
-        # Kind of a nonsense query: find all the files and contexts that
-        # executed line 47 in any file:
+        # Kind of a nonsense query:
+        # Find all the files and contexts that executed line 47 in any file:
         c.execute(
             "select file_id, context_id from line_bits where num_in_numbits(?, numbits)",
             (47,)

doc/dbschema.rst

@@ -19,8 +19,9 @@ be preferred to accessing the database directly.  Only advanced uses will need
 to use the database.
 
 The schema can change without changing the major version of coverage.py, so be
-careful when accessing the database directly.  The `coverage_schema` table has
-the schema number of the database.  The schema described here corresponds to:
+careful when accessing the database directly.  The ``coverage_schema`` table
+has the schema number of the database.  The schema described here corresponds
+to:
 
 .. [[[cog
     from coverage.sqldata import SCHEMA_VERSION