Fix code highlighting

content/en/bash-lifehacks/bash-arrays-and-hashmaps.md

@@ -10,19 +10,19 @@ Sometimes there is a need to use in BASH such structures as lists (also known as
 
 Array creation in bash can be done this way:
 
-```shell
+```bash
 sample_array=(foo bar bazz)
 ```
 
 In order to add single or multiple new elements to the end of array, you should use this syntax:
 
-```shell
+```bash
 sample_array+=(six seven)
 ```
 
 In order to get elements of the list in a cycle, you should use this syntax:
 
-```shell
+```bash
 for i in ${sample_array[@]}
 do
   echo $i
@@ -31,7 +31,7 @@ done
 
 Here is an example how to get element by its index:
 
-```shell
+```bash
 echo ${sample_array[0]}
 echo ${sample_array[3]}
 
@@ -40,7 +40,7 @@ echo ${sample_array[3]}
 
 Array slicing:
 
-```shell
+```bash
 sliced_array=${sample_array[@]:1} # will get all elements of a sample_array, starting with 1st
 another_sliced_array=${sample_array[@]:1:5} # will get sample_array elements since 1st to 5th
 ```
@@ -48,19 +48,19 @@ another_sliced_array=${sample_array[@]:1:5} # will get sample_array elements sin
 ## 2. Hashmaps
 To create hashmap in bash use this syntax:
 
-```shell
+```bash
 declare -A sample_hashmap=([one]=one [two]=two [three]=three [four]=four [five]=five)
 ```
 
 This will add new key "foo" with value "bar":
 
-```shell
+```bash
 sample_hashmap[foo]=bar
 ```
 
 Cycle: 
 
-```shell
+```bash
 for key in ${sample_hashmap[@]}
 do
   echo ${sample_hashmap[$key]}