markdownlint: enable rule MD003

MD003 - Header style
Fixed all errors

Signed-off-by: Maciej Wawryk <maciejx.wawryk@intel.com>
Change-Id: Ic00d38a3fa0af16581598fd49dc2ee7e1632c9d8
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/9287
Community-CI: Broadcom CI <spdk-ci.pdl@broadcom.com>
Community-CI: Mellanox Build Bot
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Tomasz Zawadzki <tomasz.zawadzki@intel.com>

examples/blob/cli/README.md

@@ -3,24 +3,21 @@
 The blobcli tool has several options that are listed by using the -h command
 however the three operating modes are covered in more detail here:
 
-Command Mode
-------------
+## Command Mode
 
 This is the default and will just execute one command at a time. It's simple
 but the downside is that if you are going to interact quite a bit with the
 blobstore, the startup time for the application can be cumbersome.
 
-Shell Mode
-----------
+## Shell Mode
 
 You startup shell mode by using the -S command. At that point you will get
 a "blob>" prompt where you can enter any of the commands, including -h,
 to execute them. You can stil enter just one at a time but the initial
 startup time for the application will not get in the way between commands
 anymore so it is much more usable.
 
-Script (aka test) Mode
-----------------------
+## Script (aka test) Mode
 
 In script mode you just supply one command with a filename when you start
 the cli, for example `blobcli -T test.bs` will feed the tool the file

mdl_rules.rb

@@ -1,5 +1,4 @@
 all
-exclude_rule 'MD003'
 exclude_rule 'MD004'
 exclude_rule 'MD010'
 rule 'MD013', :line_length => 170