topics: standardize `strings` topic
There were quite a few topics that were string related
and not listed in the [topics list](https://github.com/exercism/problem-specifications/blob/master/TOPICS.txt).
* Replace all of them with `strings` which is in the list.
* Add `parsing` if the topic was `string_parsing`.
"topics": [
"case",
"loop",
- "string_concatenation",
+ "strings",
"vector_optional"
]
},
"difficulty": 1,
"topics": [
"iterator",
- "str",
- "string"
+ "str_vs_string",
+ "strings"
]
},
{
"difficulty": 1,
"topics": [
"chars",
- "string_functions"
+ "strings"
]
},
{
"match",
"result",
"str_vs_string",
+ "strings",
"struct"
]
},
"topics": [
"combinations",
"external_crates_optional",
- "string_parsing"
+ "parsing",
+ "strings"
]
},
{
"topics": [
"calculation",
"math",
- "string_comparison",
+ "strings",
"structs"
]
},
"difficulty": 4,
"topics": [
"modulus",
- "string_concatenation"
+ "strings"
]
},
{
"topics": [
"int_string_conversion",
"loop",
- "string_concatenation",
+ "strings",
"use_of_primitive_char"
]
},
"chars",
"iterators",
"primitive_types",
- "str_vs_string"
+ "str_vs_string",
+ "strings"
]
},
{
"iterators",
"primitive_types",
"str_vs_string",
+ "strings",
"transforming"
]
},
"chars",
"iterators",
"primitive_types",
- "str_vs_string"
+ "str_vs_string",
+ "strings"
]
},
{
"topics": [
"ascii",
"chars",
- "str_vs_string"
+ "str_vs_string",
+ "strings"
]
},
{
"topics": [
"chars",
"cipher",
- "string_permutation"
+ "strings"
]
},
{
"lifetimes",
"loops",
"str_vs_string",
+ "strings",
"vector"
]
},
"difficulty": 4,
"topics": [
"operators_optional",
+ "parsing",
"result",
- "string_parsing"
+ "strings"
]
},
{
"chars",
"entry_api",
"hashmap",
- "str_vs_string"
+ "str_vs_string",
+ "strings"
]
},
{
"difficulty": 4,
"topics": [
"parsing",
- "str",
- "string"
+ "str_vs_string",
+ "strings"
]
},
{
"topics": [
"enum",
"lifetimes",
- "string_parsing",
+ "parsing",
+ "strings",
"struct",
"traits"
]
"conditionals",
"failure_crate",
"file_io",
+ "parsing",
"result",
- "string_functions",
- "string_parsing",
+ "strings",
"utf"
]
},
"topics": [
"bigint",
"external_crates_optional",
- "string_parsing",
+ "parsing",
+ "strings",
"struct",
"traits"
]
