Minor optimization

[p1r473]

Summary of Changes

• Splitting and Reading: The optimized version directly splits the input line into key and value using the IFS="=" and read command, eliminating the need for an intermediate array (tokens).
• Trimming Spaces: The optimized version uses parameter expansion to remove leading and trailing spaces from key, which is more efficient and avoids the need for external commands like sed.
• Quote Handling: Both versions handle quotes in the value using the (Q) parameter expansion.

Benefits of Optimization

• Efficiency: Directly reading and splitting the line into key and value is more efficient than first reading the entire line into a variable and then splitting it.
• Simplicity: The optimized version is simpler and more readable, as it avoids the intermediate array and unnecessary operations.
• Performance: By avoiding external commands and intermediate steps, the optimized version improves the script's performance.

alias -g | sort: This remains the same, listing all global aliases and sorting them.

while IFS="=" read -r key value; do: This reads each line of the sorted aliases into the variables key and value directly, using the equal sign (=) as the delimiter. IFS (Internal Field Separator) is set to = to split the line into key and value.

key="${key## }" and key="${key%% }": These lines remove leading and trailing spaces from key respectively. ${key## } removes leading spaces, and ${key%% } removes trailing spaces.

value="${(Q)value}": This remains the same as in the original lines, removing quotes from the value using the (Q) parameter expansion modifier.

[MichaelAquilina]

Tested it out and works well. Thanks :)