title case fixes

docs/en/interfaces/formats.md

-# Formats for input and output data {#formats}
+# Formats for Input and Output Data {#formats}
 
 ClickHouse can accept and return data in various formats. A format supported for input can be used to parse the data provided to `INSERT`s, to perform `SELECT`s from a file-backed table such as File, URL or HDFS, or to read an external dictionary. A format supported for output can be used to arrange the
 results of a `SELECT`, and to perform `INSERT`s into a file-backed table.
@@ -65,7 +65,7 @@ SELECT EventDate, count() AS c FROM test.hits GROUP BY EventDate WITH TOTALS ORD
 2014-03-23      1406958
 ```
 
-### Data formatting
+### Data Formatting
 
 Integer numbers are written in decimal form. Numbers can contain an extra "+" character at the beginning (ignored when parsing, and not recorded when formatting). Non-negative numbers can't contain the negative sign. When reading, it is allowed to parse an empty string as a zero, or (for signed types) a string consisting of just a minus sign as a zero. Numbers that do not fit into the corresponding data type may be parsed as a different number, without an error message.