fix docstring text

src/read_sequencing.py

-""" Read Sequencing
+"""Read Sequencing!
+
+Simulate the sequencing of reads on the template of terminal fragments and simulates reads of these fragments.
 Author: Kathleen Moriarty
-Class: Programming for Life Sciences
 """
 
 
-def read_sequencing(frag_file_name, output_file_name, num_reads, read_len, num_seq_cyc):
-    """Reads a fasta-formatted file of terminal fragments and simulates reads of these fragments.
+def read_sequencing(
+        frag_file_name,
+        output_file_name,
+        num_reads,
+        read_len,
+        num_seq_cyc,
+) -> None:
+    """Reads a fasta-formatted file of terminal fragments and simulates reads.
 
     Simulate the sequencing of reads on the template of terminal
     fragments. Reads are copies of fixed length starting
@@ -13,19 +20,17 @@ def read_sequencing(frag_file_name, output_file_name, num_reads, read_len, num_s
     is larger than the fragment length, sequencing would in
     principle proceed into the 3' adaptor and then would perhaps
     yield random bases. For simplicity, here we assume that random
-    nucleotides are introduced in this case.
-
-    :param output_file_name: file name where to store the output
-    :param num_seq_cyc: integer of number of cycles
-    :param read_len: integer of identical read length
-    :param num_reads: number of total reads to simulate
-    :param frag_file_name: input file of terminal fragments
-
-    Output:
-    Fasta-formatted file ("../output/reads.csv") of reads of identical length, representing 5’
-    ends of the terminal fragments
+    nucleotides are introduced in this case. Saves a fasta-formatted
+    file of reads of identical length, representing 5’
+    ends of the terminal fragments as .txt.
+
+    Args:
+        frag_file_name (string): input file of terminal fragments
+        output_file_name (string): file name where to store the output
+        num_reads: number of total reads to simulate
+        read_len: integer of identical read length
+        num_seq_cyc: integer of number of cycles
     """
-
     # Import classes
     from random import choices, randrange
     import numpy as np