[docs] Added permalink to each param (#1498)

* added permalink to each parameter

* run parameter_generator.py

* concretized links

* hotfix

* run parameter_generator.py

* added space between param name and permalink

* added info about initscore_filename in Continued Training section and edited links

* replaced aliases for weight and group with original names

* disable emoji

docs/Features.rst

@@ -201,9 +201,9 @@ LightGBM supports the following metrics:
 
 -  MAP
 
--  Multi class log loss
+-  Multi-class log loss
 
--  Multi class error rate
+-  Multi-class error rate
 
 -  Fair
 

docs/Quick-Start.rst

@@ -37,8 +37,8 @@ For the setting details, please refer to `Parameters <./Parameters.rst>`__.
 Weight and Query/Group Data
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
-LightGBM also supports weighted training, it needs an additional `weight data <./Parameters.rst#io-parameters>`__.
-And it needs an additional `query data <./Parameters.rst#io-parameters>`_ for ranking task.
+LightGBM also supports weighted training, it needs an additional `weight data <./Parameters.rst#weight-data>`__.
+And it needs an additional `query data <./Parameters.rst#query-data>`_ for ranking task.
 
 Also, weight and query data could be specified as columns in training data in the same manner as label.
 

helper/parameter_generator.py

@@ -147,7 +147,7 @@ def GenParameterDescription(sections, descriptions, params_rst):
                 checks_str = ', constraints: ``{0} {1} {2}``'.format(name, sign, number)
             else:
                 checks_str = ''
-            main_desc = '-  ``{0}``, default = ``{1}``, type = {2}{3}{4}{5}'.format(name, default, param_type, options_str, aliases_str, checks_str)
+            main_desc = '-  ``{0}`` :raw-html:`<a id="{0}" title="Permalink to this parameter" href="#{0}">&#x1F517;&#xFE0E;</a>`, default = ``{1}``, type = {2}{3}{4}{5}'.format(name, default, param_type, options_str, aliases_str, checks_str)
             params_to_write.append(main_desc)
             params_to_write.extend([' ' * 3 * int(desc[0][-1]) + '-  ' + desc[1] for desc in param_desc['desc']])