grep ограниченное количество символов -одна строка

Я хочу найти слово в нескольких файлах и вернуть только одну строку для каждого результата или ограниченное количество символов (40 ~80 символов, например ), а не всю строку, как по умолчанию.

grep -sR 'wp-content'.

file_1.sql:3309:blog/wp-content 
file_1.sql:3509:blog/wp-content 
file_2.sql:309:blog/wp-content 

В настоящее время я вижу следующее:

grep -sR 'wp-content'.

file_1.sql:3309:blog/wp-content-Progressively predominate impactful systems without resource-leveling best practices. Uniquely maximize virtual channels and inexpensive results. Uniquely procrastinate multifunctional leadership skills without visionary systems. Continually redefine prospective deliverables without.
file_1.sql:3509:blog/wp-content-Progressively predominate impactful systems without resource-leveling best practices. Uniquely maximize virtual channels and inexpensive results. Uniquely procrastinate multifunctional leadership skills without visionary systems. Continually redefine prospective deliverables without. 
file_2.sql:309:blog/wp-content-Progressively predominate impactful systems without resource-leveling best practices. Uniquely maximize virtual channels and inexpensive results. Uniquely procrastinate multifunctional leadership skills without visionary systems. Continually redefine prospective deliverables without.