Minor description edits

pgscatalog_utils/download/download_scorefile.py

@@ -88,6 +88,10 @@ def _description_text() -> str:
     The PGS Catalog API is queried to get a list of scoring file
     URLs. Scoring files are downloaded via FTP to a specified
     directory. PGS Catalog scoring files are staged with the name:
+
+            {PGS_ID}.txt.gz
+
+    If a valid build is specified harmonized files are downloaded as:
     
         {PGS_ID}_hmPOS_{genome_build}.txt.gz
     

pgscatalog_utils/match/match_variants.py

@@ -123,12 +123,12 @@ def _description_text() -> str:
     makes matching faster and simpler.
     
     Target genomes can be in plink1 bim format or plink2 pvar
-    format. Variant IDs should be unique.
+    format. Variant IDs should be unique so that they can be specified
+    in the scoring file as: variant_id|effect_allele|[effect_weight column(s)...] 
     
     Only one set of target genomes should be matched at a time. Don't
-    try to match target genomes from different plink
-    filesets. Matching against a set of chromosomes from the same
-    fileset is OK (see --split). 
+    try to match target genomes from different plink filesets. Matching 
+    against a set of chromosomes from the same fileset is OK (see --split). 
    ''')
 
 

pgscatalog_utils/scorefile/combine_scorefiles.py

@@ -43,7 +43,8 @@ def _read_and_melt(path, drop_missing: bool = False):
 
 def _description_text() -> str:
     return textwrap.dedent('''\
-    Combine multiple scoring files in PGS Catalog format to a 'long'
+    Combine multiple scoring files in PGS Catalog format (see 
+    https://www.pgscatalog.org/downloads/ for details) to a 'long'
     table, and optionally liftover genomic coordinates to GRCh37 or
     GRCh38. Custom scorefiles in PGS Catalog format can be combined
     with PGS Catalog scoring files. The program can accept a mix of