Implement markdownlint suggestions

Author: hb20007

advent-of-code/2018/day-01/README.md

@@ -4,17 +4,17 @@ After feeling like you've been falling for a few minutes, you look at the device
 
 For example, if the device displays frequency changes of `+1, -2, +3, +1`, then starting from a frequency of zero, the following changes would occur:
 
-- Current frequency ` 0`, change of `+1`; resulting frequency ` 1`.
-- Current frequency ` 1`, change of `-2`; resulting frequency `-1`.
-- Current frequency `-1`, change of `+3`; resulting frequency ` 2`.
-- Current frequency ` 2`, change of `+1`; resulting frequency ` 3`.
+- Current frequency `0`, change of `+1`; resulting frequency `1`.
+- Current frequency `1`, change of `-2`; resulting frequency `-1`.
+- Current frequency `-1`, change of `+3`; resulting frequency `2`.
+- Current frequency `2`, change of `+1`; resulting frequency `3`.
 
 In this example, the resulting frequency is `3`.
 
 Here are other example situations:
 
-- `+1, +1, +1` results in ` 3`
-- `+1, +1, -2` results in ` 0`
+- `+1, +1, +1` results in `3`
+- `+1, +1, -2` results in `0`
 - `-1, -2, -3` results in `-6`
 
 Starting with a frequency of zero, **what is the resulting frequency** after all of the changes in frequency have been applied?
@@ -25,13 +25,13 @@ You notice that the device repeats the same frequency change list over and over.
 
 For example, using the same list of changes above, the device would loop as follows:
 
-- Current frequency ` 0`, change of `+1`; resulting frequency ` 1`.
-- Current frequency ` 1`, change of `-2`; resulting frequency `-1`.
-- Current frequency `-1`, change of `+3`; resulting frequency ` 2`.
-- Current frequency ` 2`, change of `+1`; resulting frequency ` 3`.
+- Current frequency `0`, change of `+1`; resulting frequency `1`.
+- Current frequency `1`, change of `-2`; resulting frequency `-1`.
+- Current frequency `-1`, change of `+3`; resulting frequency `2`.
+- Current frequency `2`, change of `+1`; resulting frequency `3`.
 - (At this point, the device continues from the start of the list.)
-- Current frequency ` 3`, change of `+1`; resulting frequency ` 4`.
-- Current frequency ` 4`, change of `-2`; resulting frequency ` 2`, which has already been seen.
+- Current frequency `3`, change of `+1`; resulting frequency `4`.
+- Current frequency `4`, change of `-2`; resulting frequency `2`, which has already been seen.
 
 In this example, the first frequency reached twice is `2`. Note that your device might need to repeat its list of frequency changes many times before a duplicate frequency is found, and that duplicates might be found while in the middle of processing the list.
 

advent-of-code/README.md

@@ -1,6 +1,6 @@
 # :christmas_tree: Advent of Code
 
-[Advent of Code](http://adventofcode.com) is an event where each year, starting on December 1st and ending on December 25th, a new programming puzzle is posted once a day. Advent of Code began in 2015.
+[Advent of Code](https://adventofcode.com/) is an event where each year, starting on December 1st and ending on December 25th, a new programming puzzle is posted once a day. Advent of Code began in 2015.
 
 ## Index
 
@@ -11,3 +11,4 @@
 | [2017](2017/) |    JS    | **06** / 25 |
 | [2018](2018/) |    JS    | **09** / 25 |
 | [2019](2019/) |  Python  | **04** / 25 |
+| [2020](2020/) |    TS    | **00** / 25 |

leetcode/README.md

@@ -1,4 +1,5 @@
 # LeetCode Solutions
+
 My solutions to the problems on https://leetcode.com/problemset/all/
 
 ## Problems