add easy diff for document tracking

[zhang2014]

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Category :

• Documentation

Detailed description (optional):

for example:

☁  tools [docs/diff_script] ⚡ ./easy_diff.py zh/data_types

use stdout print :

Need translate document:/Users/coswde/Source/ClickHouse/docs/tools/../../docs/en/data_types/uuid.md

use git pager print:

diff --git a/docs/en/data_types/domains/ipv6.md b/docs/en/data_types/domains/ipv6.md
index 1bfbe3400b..e2abaff017 100644
--- a/docs/en/data_types/domains/ipv6.md
+++ b/docs/en/data_types/domains/ipv6.md
@@ -4,13 +4,13 @@
 
 ### Basic Usage
 
-``` sql
+```sql
 CREATE TABLE hits (url String, from IPv6) ENGINE = MergeTree() ORDER BY url;
 
 DESCRIBE TABLE hits;
 ```
 
-```
+```text
 ┌─name─┬─type───┬─default_type─┬─default_expression─┬─comment─┬─codec_expression─┐
 │ url  │ String │              │                    │         │                  │
 │ from │ IPv6   │              │                    │         │                  │
@@ -19,19 +19,19 @@ DESCRIBE TABLE hits;
 
 OR you can use `IPv6` domain as a key:
 
-``` sql
+```sql
 CREATE TABLE hits (url String, from IPv6) ENGINE = MergeTree() ORDER BY from;
... MORE

[zhang2014]

This script is based on the assumption that documents in other languages are fully synchronized with the en document at a commit.

[blinkov]

Suggested change

	def diffFile(reference_file, working_file, git, temp_diff):
	def diff_file(reference_file, working_file, git, temp_diff):

snake_case style is more common in python for function names and as far as I remember nearby scripts use it, let's change this? (here and below)

[blinkov]

not so important, but I think:

• it's better to write CLICKHOUSE in one word
• os.path.join(os.path.dirname(SCRIPT_PATH), '..', '..') looks better

[blinkov]

shouldn't we use this number as exit code below where we call these functions?

[blinkov]

We'd better start using argparse module right away to make it more flexible and extendable. For example there could be an option to skip the git pager part.

[blinkov]

This script is based on the assumption that documents in other languages are fully synchronized with the en document at a commit.

@zhang2014 it's better to add this comment to --help output or at least in code comments